All measurements are approximate:
8g has a 1/4" (6.5mm) front flare.6g has a 9/32" (7mm) front flare.4g has a 13/32" (10.5mm) front flare.2g has a 15/32" (12mm) front flare.0g has a 1/2" (12.7mm) front flare.00g has a 9/16" (14mm) front flare.7/16" has an 11/16" (18mm) front flare.1/2" has a 3/4" (19mm) front flare.9/16" has a 13/16" (21mm) front flare.5/8" has a 7/8" (22mm) front flare.3/4" has a 1" (25.7mm) front flare.7/8" has a 1-1/8" (28.5mm) front flare.1" has a 1-1/4" (32mm) front flare.
All sizes have a 3/8" wearable
